how many cranks?
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Re: how many cranks? (dwestsr)
dwester, and Russ 105,
Your situations exhibit similar symptoms. Of course the relay has nothing to do with the pressure dropping after the engine is shut off. A good check, would be to verify the pump is running for two seconds, when the ignition is first turned on. If it does, you can move on to leaking injectors, check valves, etc.
sspackman,
No problem. It is a simple replacement, however. Two screws (I think) and one plug in. Its located on the firewall next to the ww motor.
RACE ON!!!
Your situations exhibit similar symptoms. Of course the relay has nothing to do with the pressure dropping after the engine is shut off. A good check, would be to verify the pump is running for two seconds, when the ignition is first turned on. If it does, you can move on to leaking injectors, check valves, etc.
sspackman,
No problem. It is a simple replacement, however. Two screws (I think) and one plug in. Its located on the firewall next to the ww motor.
RACE ON!!!
Thread Starter
Pro
Joined: Jan 2004
Posts: 565
Likes: 0
From: Toronto ON
Re: how many cranks? (CFI-EFI)
CFI-
When I changed the injectors, of course I had to de-pressurize the system. I removed the fuse to the fuel pump, cranked, engine started and quit almost immediately.
Does this give you any additional info as to what the problem could be? I somehow thought the engine would have run longer before starving as I had heard that the system stays pressurized for quite a while after shut-down :confused:
When I changed the injectors, of course I had to de-pressurize the system. I removed the fuse to the fuel pump, cranked, engine started and quit almost immediately.
Does this give you any additional info as to what the problem could be? I somehow thought the engine would have run longer before starving as I had heard that the system stays pressurized for quite a while after shut-down :confused:
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Re: how many cranks? (Vett-eight-nine)
The pressure is supposed to stay high for an extended period, under static conditions. You interupted that when you cranked and started your engine. The VOLUME of fuel that was under pressure is very low. Hence, it ran out of gas, quickly. I don't see any problem in what you've reported here. One way to test the relay/ECM, would to de-pressurize the system, as you did, and observe a pressure guage, as you switch on the ignition. Without trying to start the car, the ECM should run the pump for approx 2 seconds. If all is well, you should see the guage jump up in pressure when you switch on the ignition. You can try it multiple times, if necessary. Just make sure the ignition is, off, for at least 10 seconds between tries. I hope that helps.
RACE ON!!!
[Modified by CFI-EFI, 1:11 PM 2/21/2004]
RACE ON!!!
[Modified by CFI-EFI, 1:11 PM 2/21/2004]
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Re: how many cranks? (Vett-eight-nine)
Ignorance, here.
This would be a pressure gauge connected to the p.s. fuel rail, at the valve?
Thanks.
This would be a pressure gauge connected to the p.s. fuel rail, at the valve?
Thanks.
Of course you can check out the relay/ECM function with a volt/ohm meter, as well.
RACE ON!!!
Thread Starter
Pro
Joined: Jan 2004
Posts: 565
Likes: 0
From: Toronto ON
Re: how many cranks? (CFI-EFI)
"Of course you can check out the relay/ECM function with a volt/ohm meter, as well."
Sure. If you know what you're doing... :bb
[Modified by Vett-eight-nine, 6:20 PM 2/21/2004]
